As promised, the season finale of "Saturday Night Live" was a musical extravaganza. Episode host Mick Jagger used Arcade Fire and Foo Fighters as his backing band for two performances. Arcade Fire, with the Strokes' Nikolai Fraiture on bass, joined him for the Stones' "The Last Time", while Foo Fighters and Jagger did a medley of the Stones' "19th Nervous Breakdown" and "It's Only Rock 'n Roll (But I Like It)". At the end of the show, Arcade Fire returned to join Jagger and the "SNL" cast to perform "She's a Rainbow" and "Ruby Tuesday" in tribute to Kristen Wiig, who is leaving the cast.